DKA patients do require decisive and prompt treatment. The aim of the current study was to introduce capnography as a screening tool for DKA diagnosis. Capnography is a simple, noninvasive and inexpensive method that could be performed at bedside. A linear relation could be detected between capnography and blood bicarbonate values. Capnography could be used to rule out DKA in patients with increased blood sugar levels with a cut-off point of 24.5 mmHg, with sensitivity of 0.90 and specificity of 0.90."